In this paper, Zn-3Cu alloy is taken as the research object. The effects of rolling deformation on the microstructure, mechanical properties and corrosion resistance of Zn-3Cu alloy were studied. It is found that with the increase of rolling deformation, the grain refinement of Zn-3Cu alloy matrix is deepened, and the CuZn5 phase in the alloy is elongated and partially broken along the rolling direction. The strength of Zn-3Cu alloy increases first and then decreases, and the plasticity increases continuously. The Zn-3Cu alloy with 60 % deformation has the highest yield strength, reaching 263.1 ± 4.9 MPa. With the increase of deformation, the corrosion resistance of the as-rolled Zn-3Cu alloy gradually decreases, and the as-cast Zn-3Cu alloy exhibits excellent corrosion resistance.